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It is important to remember several basic concepts before we talk about the technical aspects of using the WP REST API. If you want an in-depth introduction to the REST API, then you can check out the comprehensive introduction to the REST API, the first article in this series.
API stands for Application Programming Interface. An API is an automated way to connect to an application's data. Facebook's API, for example, exposes a host of Facebook platform features.
REST is an acquaintance for delegate state transfer. An API can be viewed as a REST if its design / architecture subscribes to a specific set of constraints, including client-server mechanisms, independent implementations, and options for scalability.
Requests and responses form the complementary components of HTTP in how HTTP works.
A client requests HTTP from a server
Server responds with HTTP response
In HTTP, this mechanism works using GET (request) and POST (response).
Root and endpoint
Note that in the first example above, we used the following endpoints:
GET wp / v2 / post
Endpoints are capabilities that are accessible via the API and they fix certain activities such as retrieving posts to another user or updating the post meta. On the other hand, we can say that an endpoint drives a technique that performs a specific function. These endpoints are subject to the HTTP verb associated with them. In the above case, we are using the GET verb to retrieve all positions.
The following is the route to the above endpoint:
Wp / v2 / posts
A course is essentially a name to get to the end point. A course can have multiple endpoints in view of HTTP verbs, so the last point to create another post in the above course is:
POST wp / v2 / post
This endpoint, when triggered with the supplied parameters, will create a new post unit.
Consider the following route:
wp/v2/posts/50
This route points to a post unit with an ID of 50. It has the following three endpoints:
- GET wp / v2 / posts / 50: It can be used to retrieve posts with ID of 50. This triggers the get_item () method.
- PUT wp / v2 / posts / 50: can be used to update posts with an ID of 50: 50. This triggers update_item ()
- DELETE wp / v2 / posts / 50: This removes posts with an ID of 50. This triggers the delete_item () method.
WordPress REST API using JSON
REST and JSON together provide a component to build capable applications using the WordPress back-end. The most prominent cases are mobile applications that require the exchange of information between the client and the server.
Since JSON is a text-based format for keeping information away, it can be used flawlessly with most programming languages. Thus JSON acts as a worldwide connector, trading information between different stages that are interpretable by both machines and people alike.
As discussed in the use of the WordPress Rest API, the content of your WordPress site is not limited to itself, but can also be accessed by other sites and customers. As the API exposes parts of the internal functionality, remote customers can interact with your site to update your content or create new content. It also allows to retrieve some content from an existing WordPress site and show it on another site.
As with the use of APIs such as being investigated, the content of your WordPress site is not limited to itself, but can be received by various destinations and customers. As APIs have exposed certain classes of incoming utility, remote customers can communicate with your site anew or create new content. It likewise allows some content to be retrieved from an existing WordPress site and displayed on another site.
Installation instructions
You should have a good idea of what the WP API is capable of and what its limitations are. Let us show you the steps involved in working with it. First of all, you need to add WP API plugin to your WordPress site.
At that point, log into your WordPress site (your-site-name.com/wp-login.php). However, click on Plugins and Add New in the left sidebar. Click on the Upload plugin button, click on Choose File and select the compressed version of the WP API plugin and later click on Install Now.
This is all involved with configuring the WP REST API. Now, we can get fun content and get some data from our WordPress website using WP API.
For example WP REST API request
We are going to show you examples of some unauthorized WP API GET requests. Therefore, there is no need to worry about any authentication plugins or settings.
Start by adding the Postman Chrome extension. If you use Firefox you can also install REST Easy add-on.
Receiving posts
Wordpress get_posts
The wordpress get_posts function is responsible for getting the data. It is one of the widely used functions in many plugins and themes that display posts on the front-end. The WP get_posts function retrieves an array of positions and accepts multiple parameters such as numberpost, range, include, exclude, etc.
The best way to use the wordpress get_posts function is to create an array and pass the appropriate parameters to get the desired result. For example, if we need to fetch 10 terms of 'WordPress tutorials', let wp get_posts do the following.
$args = array( 'numberposts' => 10, 'post_type' => 'code-post' ); $latest_books = get_posts( $args );
We are going to show you how to get all the posts currently on your WordPress site. To do this, copy the following URL (route):
http://www.your-web-site.com/wp-json/wp/v2/posts
Paste that passage into the postman's entry, ask for the URL here. You can do this by essentially writing the above route in a web browser, yet the data will not be organized, so the mapping will be more difficult to see. Replace with your-web-site.com 'with the site on which you started the WP API plugin. Choose GET from the drop down and click 'Send'.
It is sending a GET request to the server of your WordPress site and sending back the response based on the server root and HTTP action. You should see the same JSON response given below.
As should be obvious, it is held positively in response so that you can get the information inside it without any stretch and usually; It is also known as mapping which is also called schema. This structure is really important because knowing this allows you to move data programmatically.
Get a post
Now that you know how to get a list of posts on your site, we show you how you can get a specific post from your WordPress site that has a WP API plugin installed. Copy the route given below.
http://www.your-web-site.com/wp-json/wp/v2/posts/{id}
Paste the request URL in the postman in the field here. Again, make sure that you select GET from the drop-down. Replace yourweb-site.com with the website on which you have installed the WP API plugin and replace {ID} with an ID present on the Word ID site.
As you can see, there is no square square bracket to initiate a response. This means that this response is an object and not an array of objects. In particular, this response includes all post data related to the post. The individual post data of the post is the same as in the list of posts above. You can again parse through the response and see the post id, post title, post content, post excerpt, and any other post details.
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